/*
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灏婇噸浠栦汉鍔冲姩鎴愭灉;
杞浇璇蜂繚鐣欑礌鏉愬鍥摼鎺� - www.sucaijiayuan.com
*/
(function($){

    $.fn.jqueryzoom = function(options){
    var settings = {
            xzoom: 200,//zoomed width default width
            yzoom: 200,//zoomed div default width
            offset: 10,	//zoomed div default offset
            position: "right",//zoomed div default position,offset position is to the right of the image
            lens:1, //zooming lens over the image,by default is 1;
            preload: 1
        };

        if(options) {
            $.extend(settings, options);
        }

        var noalt='';
        $(this).hover(function(){

        var imageLeft = this.offsetLeft;
        var imageRight = this.offsetRight;
        var imageTop =  $(this).get(0).offsetTop;
        var imageWidth = $(this).children('img').get(0).offsetWidth;
        var imageHeight = $(this).children('img').get(0).offsetHeight;


        noalt= $(this).children("img").attr("alt");

        var bigimage = $(this).children("img").attr("jqimg");

        $(this).children("img").attr("alt",'');

        if($("div.zoomdiv").get().length == 0){

        $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");


        $(this).append("<div class='jqZoomPup'>&nbsp;</div>");

        }


        if(settings.position == "right"){

        if(imageLeft + imageWidth + settings.offset + settings.xzoom > screen.width){

        leftpos = imageLeft  - settings.offset - settings.xzoom;

        }else{

        leftpos = imageLeft + imageWidth + settings.offset;
        }
        }else{
        leftpos = imageLeft - settings.xzoom - settings.offset;
        if(leftpos < 0){

        leftpos = imageLeft + imageWidth  + settings.offset;

        }

        }

        $("div.zoomdiv").css({ top: imageTop,left: leftpos });

        $("div.zoomdiv").width(settings.xzoom);

        $("div.zoomdiv").height(settings.yzoom);

        $("div.zoomdiv").show();

        if(!settings.lens){
          $(this).css('cursor','crosshair');
        }




               $(document.body).mousemove(function(e){



               mouse = new MouseEvent(e);

               /*$("div.jqZoomPup").hide();*/


                var bigwidth = $(".bigimg").get(0).offsetWidth;

                var bigheight = $(".bigimg").get(0).offsetHeight;

                var scaley ='x';

                var scalex= 'y';


                if(isNaN(scalex)|isNaN(scaley)){

                var scalex = (bigwidth/imageWidth);

                var scaley = (bigheight/imageHeight);




                $("div.jqZoomPup").width((settings.xzoom)/scalex );

                $("div.jqZoomPup").height((settings.yzoom)/scaley);

                if(settings.lens){
                $("div.jqZoomPup").css('visibility','visible');
                }

               }



                xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;

                ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop ;

                if(settings.lens){

                xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;

                ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;

                }


                if(settings.lens){

                $("div.jqZoomPup").css({ top: ypos,left: xpos });

                }



                scrolly = ypos;

                $("div.zoomdiv").get(0).scrollTop = scrolly * scaley;

                scrollx = xpos;

                $("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;


                });
        },function(){

           $(this).children("img").attr("alt",noalt);
           $(document.body).unbind("mousemove");
           if(settings.lens){
           $("div.jqZoomPup").remove();
           }
           $("div.zoomdiv").remove();

        });

    count = 0;

    if(settings.preload){

    $('body').append("<div style='display:none;' class='jqPreload"+count+"'>sdsdssdsd</div>");

    $(this).each(function(){

    var imagetopreload= $(this).children("img").attr("jqimg");

    var content = jQuery('div.jqPreload'+count+'').html();

    jQuery('div.jqPreload'+count+'').html(content+'<img src=\"'+imagetopreload+'\">');

    });

    }

    }

})(jQuery);

function MouseEvent(e) {
this.x = e.pageX
this.y = e.pageY


}

